Okotoks 678S and 65S ­ Substation Upgrades In April 2016, you may have received an AltaLink project newsletter describing the Okotoks 678S and High River 65S Substation Upgrades project. The project involves adding equipment to the Okotoks and High River substations to ensure residents and businesses continue to have a reliable supply of electricity. We will be filing an application for the project with the Utilities Commission in the summer of 2016.

You can find information on this project at: www.altalink.ca/projects/view/240/okotoks-678s-and- high-river-65s-substation-upgrades

The need for this project was identified by the AESO, and you are receiving this postcard because some details regarding the AESO notification process were not included in the April 2016 newsletter. If you have concerns regarding the need, you may contact the AESO directly at: 1-888-866-2959 or [email protected] ALTALINK 2611 3 Avenue SE , AB T2A 7W7

549 TOWN OF WHO IS THE AESO? VU OKOTOKS ") OKOTOKS VU547 The Alberta Electric System Operator (AESO) is an 678S SUBSTATION independent, not-for-profit organization responsible UV7 for the safe, reliable and economic planning and Aldersyde ! operation of the provincial transmission grid. For more information about why this project is needed, " please refer to the AESO’s Need Overview included VU783 UV2A with the April 2016 package, or visit www.aeso.ca. If UV2 Highwood you have any questions or concerns about the need River for this project you may contact the AESO directly or you can make your concerns known to an AltaLink VU543 ") HIGH RIVER TOWN representative who will collect your personal 65S OF HIGH SUBSTATION RIVER information for the purpose of addressing your LEGEND questions and/or concerns to the AESO. This process ") Road may include disclosure of your personal information LegePnrdoposed Upgrade to Existing Substation " Existing Substation Urban Area to the AESO. Existing Transmission Line Water Body ! Hamlet or Locality